Q1 The circuit below has been connected for a long time and all transients have dissipated. The switch is then opened at

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Q1 The Circuit Below Has Been Connected For A Long Time And All Transients Have Dissipated The Switch Is Then Opened At 1 (62.14 KiB) Viewed 15 times

Q1 The circuit below has been connected for a long time and all transients have dissipated. The switch is then opened at t=0 seconds. (a) Draw the equivalent circuit when t < 0. (b) Draw the equivalent RL circuit when t>0, and find its time constant (Ans: T = 4ms) (c) Find il(t) for all time. (Ans: 12.5 Amps forts 0, 12.5e^(-250t) Amps fort > 0) (d) Find ir(t) for all time. (Ans: 0 Amps forts 0, -4.171-250t) Amps fort > 0) (e) Sketch il(t) and ir(t) on the same plot, labelling the axes and the initial points. () What percentage of the initial energy stored in the inductor was dissipated in the 62 resistor in the RL circuit 5ms after the switch was opened? (Ans: 30.6%) t=0 602 30 W Lola 120v ( 30Ω 8mH 3 Liuc) 3n3 on line)